Harrow



(No Model.)

J. T. GREENWOOD.

HARROW.

No. 432.185. Patented July 15,1890.

UNITED STATES PATENT OEEicE.

JOHN T. GREENWVOOD, OF KALAMAZOO, MICHIGAN.

HARROW.

SPECIFICATION forming part of Letters Patent No. 432,185, dated July 15, 1890.

Application filed March 28, 1890- SerialNo. 345,686. (No model.)

To all whom it may concern.-

Be it known that 1, JOHN T. GREENWOOD, a citizen of the United States, residing at Kalamazoo, county of Kalamazoo,.State of Michigan, have invented a new and useful Harrow, of which the following is a specification.

This invention relates to harrow-frames made in detachable and adjustable sections.

The invention has for one of its objects the peculiar construction in looking the rear sections to the front sections when desiring to make the frame rigid, and unlocking the same when desiring to raise the rearsections to clear obstructions.

Other objects consist in the peculiar con struction of certain details and combination of parts described and claimed below.

In the drawings forming a part of this specification, Figure 1 is a plan view. Fig. 2 is an elevation of broken details, lettered in Fig. 1.

' Fig. 3 is an enlarged section on line 4 4: in

Fig. 1, looking from a point above. Fig. 4. is a section on line 6 6 in Fig. 1, looking from a point at the left; and Fig. 5 is a section 011 line 2 2 in Fig. 1, looking from a point below.

Referring to the lettered parts of the drawings, A A are two sectional parts of a harrowframe hinged together by the rod R, which passes through eyes attached to each section and constitutes the hinging-pivot of these sections and the draft-bar of the frame, to which bar the whifl'letrees are attached when in use. These sections are made of two parallel tooth-bars, and when hinged together somewhat resemble a'letter A, thus diverging toward the rear from their hinged front connections. These sections are attached together at the rear by lock-braces o d, which bars are attached to the sections, project in- .ward therefrom and lap by each other, and

are pivoted together at a. The end of each of these locking-bars is provided with a lug S. The lug of one bar catches under the lower edge of the other bar, as shown in Figs. 1 and 2. This means of attaching the sections together prevents the sections from settling down at the sides and from a tendency to approach or recede from each other at the rear, and at the same time allows the sections A to be swung upon their hinge R and pivot a, when desiring to fold the harrow up or to raise one section to clear obstructions. This action is clearly illustrated in Figs. 2 and 5 by the dotted position.

Directly in the rear of the sections A and diverging on a like angle are detachable and adjustable sections B These rear sections are hinged to the front sections by providing the rear sections with forwardly-proj ecting straps e, and by passing a detachable hinging-bolt 0 through the rear end of the sections A and through said straps, as shown in Figs. 1, 3, and 4. By withdrawing the hinging-bolt C the rear sections can be taken off when not desiring to have the harrow of the same capacity as when said sections .are attached.

At D is a transverse lock-bar pivoted at one end to one of the bars of the front sections, the other end of said lock-bar catching onto the other bar of said sections. Said lock-bar has an upwardly-extending handle 2. This lock-bar catches under the forwardly-projecting ends of the straps e of the rear sections 13, and thus locks said rear sections against being raised upward, except by eX press design of the user.

When the user desires to raise the rear sections for the purpose of folding them over onto the front sections preparatory to the removal ofthe harrow to and from the field, or when desiring to raise said rear sections for clearing obstructions, as indicated in Fig. 4 in dotted position, he tilts the lock-bar e forward, as indicated in the dotted position of said lock-bar, from the ends of the strap 6 and permits the rear sections to be raised, as stated.

At 2 in Fig. 1 is a handle on the rear end of the rear sections, which may be employed to raise them by.

The two side sections of one half of the harrow-fraine are of course a duplicate of the other two sections of the other half.

It will be seen that all of the sections can be detached from each other or may be folded upon each other when preparing the frame for shipment, and that the frame from its peculiar construction is strong, simple, easily operated, and operates over a wide area of ground.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is

1. The combination of the front sections hinged together by the detachable draw-bolt,

said sections diverging therefrom to the rearward, and the lock-braces extending inward from the sections and lapped by each other,

said lapping ends being pivoted together and each provided with a lug catching undervthe lapping braces, the lock-levers pivoted at one end to one bar of the sections and catching detachably onto the other bar, the rear sections having the forwardly-extended straps catchingover the lock-levers, and the detachable bolts hinging said straps to the rear of the front sections, substantially as set forth.

2. The combination of a letter-A frame composed of two sections d'etachably hinged together and a section detachably hinged to each of the front sections, the front sections being provided with the pivoted lock-levers, and the rear sections having the straps catching over said lock-levers, substantially as se't forth.

In testimony of the foregoing I have hereunto subscribed my name in presence of two Witnesses.

JOHN T. GREENWOOD.

Witnesses:

BYRON W. SHEPARDSON, JAMES BAUMANN. 

